다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

비만아 부모의 돌봄 경험: q 방법론

Advances in atomic physics, such as cooling and trapping of atoms and molecules and developments in frequency metrology, have added orders of magnitude to the precision of atom-based clocks and sensors. Applications extend beyond atomic physics and this article reviews using these new techniques to address important challenges in physics and to look for variations in the fundamental constants, search for interactions beyond the standard model of particle physics, and test the principles of general relativity.

Search for New Physics with Atoms and Molecules

Smart Energy Systems for coherent 100% renewable energy and transport solutions

Long-term patterns of European PV output using 30 years of validated hourly reanalysis and satellite data

https://publikationen.bibliothek.kit.edu/1000096238/34552729

A high-resolution hydro power time-series model for energy systems analysis: Validated with Chinese hydro reservoirs.

Multi-criteria analysis of storages integration and operation solutions into the district heating network of Aarhus – A simulation case study

Cost sensitivity of optimal sector-coupled district heating production systems

Long-term hourly time series representing the PV generation in European countries have been obtained and made available under open license. For every country, four different PV configurations, i.e. rooftop, optimum tilt, tracking, and delta have been investigated. These are shown to have a strong influence in the hourly difference between electricity demand and PV generation. To obtain PV time series, irradiance from CFSR reanalysis dataset is converted into electricity generation and aggregated at country level. Prior to conversion, reanalysis irradiance is bias corrected using satellite-based SARAH dataset and a globally-applicable methodology. Moreover, a novel procedure is proposed to infer the orientation and inclination angles representative for PV panels based on the historical PV output throughout the days around summer and winter solstices. A key strength of the methodology is that it doesn't rely on historical PV output data. Consequently, it can be applied in places with no existing knowledge of PV performance.

Using validated reanalysis data to investigate the impact of the PV system configurations at high penetration levels in European countries

Residential demands for space heating and hot water account for 31% of the total European energy demand. Space heating is highly dependent on ambient conditions and susceptible to climate change. We adopt a techno-economic standpoint and assess the impact of climate change on decentralised heating demand and the cost-optimal mix of heat pump and gas boiler technologies. Temperature data with high spatial resolution from nine climate models implementing three Representative Concentration Pathways from IPCC are used to estimate climate induced changes in the European demand side for heating. The demand side is modelled by the proxy of heating-degree days. The supply side is modelled by using a screening curve approach to the economics of heat generation. We find that space heating demand decreases by about 16%, 24% and 42% in low, intermediate and extreme global warming scenarios. When considering historic weather data, we find a heterogeneous mix of technologies are cost-optimal, depending on the heating load factor (number of full-load hours per year). Increasing ambient temperatures toward the end-century improve the economic performance of heat pumps in all concentration pathways. Cost optimal technologies broadly correspond to heat markets and policies in Europe, with some exceptions

Gorm Bruun Andresen

Papers

A high-resolution hydro power time-series model for energy systems analysis: Validated with Chinese hydro reservoirs.

Multi-criteria analysis of storages integration and operation solutions into the district heating network of Aarhus – A simulation case study

Cost sensitivity of optimal sector-coupled district heating production systems

Using validated reanalysis data to investigate the impact of the PV system configurations at high penetration levels in European countries

Impact of climate change on the cost-optimal mix of decentralised heat pump and gas boiler technologies in Europe